Add some more debugging info for invalid referrers

chrome/browser/net/chrome_network_delegate.cc

Index: chrome/browser/net/chrome_network_delegate.cc
diff --git a/chrome/browser/net/chrome_network_delegate.cc b/chrome/browser/net/chrome_network_delegate.cc
index 9a6a2219e05cde02b3de9225283d86eebb86d2a2..515568b3d92bfcd6d33ceb5c6d30b4698e60e212 100644
--- a/chrome/browser/net/chrome_network_delegate.cc
+++ b/chrome/browser/net/chrome_network_delegate.cc
@@ -9,6 +9,7 @@
 #include <vector>
 
 #include "base/base_paths.h"
+#include "base/debug/alias.h"
 #include "base/debug/dump_without_crashing.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
@@ -231,6 +232,13 @@ void ReportInvalidReferrerSend(const GURL& target_url,
                                const GURL& referrer_url) {
   base::RecordAction(
       base::UserMetricsAction("Net.URLRequest_StartJob_InvalidReferrer"));
+  // http://crbug.com/422871
+  char url_buf[128];
+  char referrer_buf[128];
+  base::strlcpy(url_buf, target_url.spec().c_str(), arraysize(url_buf));
+  base::strlcpy(referrer_buf, referrer_url.spec().c_str(), arraysize(url_buf));
+  base::debug::Alias(url_buf);
+  base::debug::Alias(referrer_buf);
   base::debug::DumpWithoutCrashing();
   NOTREACHED();
 }